Question

the class intervals of the grouped data:
5-9, 10-14, 15-19, 20-24
a) inclusive class
b) exclusive class
c) discrete class
d) none of theses
​

Answer 1

A)Inclusive class is correct

Answer 2

inclusive form of class intervals

Given

• class intervals
• 5-9, 10-14, 15-19, 20-24

To find

• if the given causes are inclusive or exclusive or discrete

solution

We know that the class Endeavour type of representation of data has mainly two forms namely inclusive type class interval and exclusive type class interval.

Inclusive type class interval

• ln this form of representation both the upper limit and the lower limit of a class interval are strictly included in that interval.

• Generally there is a gap between the upper limit of a particular class interval and the lower limit of the subsequent class interval

• This type of class interval since it has a gap is not advisable or preferred.

Exclusive type of class interval

• ln this form of representation the lower limit of the class is included in the particular class interval and the upper limit is included in the succeeding class interval.

• There is no gap between subsequent class intervals.

• Since there is no gap between the class intervals this type of class intervals are generally preferred.

It can be easily seen from the given question and the class intervals provided that there is a gap between the upper limit of a particular class interval and the lower limit of the subsequent class interval

Therefore, the given class intervals are of inclusive form of class intervals.

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